/*
 * Copyright 1999-2015 dangdang.com.
 * <p>
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * </p>
 */

package com.cqdev.washer.infra.util.keygen.fixture;



import com.cqdev.washer.infra.util.keygen.DefaultKeyGenerator;
import com.cqdev.washer.infra.util.keygen.TimeService;

import java.util.concurrent.atomic.AtomicInteger;

public final class FixedTimeService extends TimeService {

	private final int expectedInvokedTimes;

	private final AtomicInteger invokedTimes = new AtomicInteger();

	private long current = DefaultKeyGenerator.EPOCH;

	public FixedTimeService(int expectedInvokedTimes) {
		super();
		this.expectedInvokedTimes = expectedInvokedTimes;
	}

	@Override
	public long getCurrentMillis() {
		if (invokedTimes.getAndIncrement() < expectedInvokedTimes) {
			return current;
		}
		invokedTimes.set(0);
		return ++current;
	}

}
